The volume of characters introduced in short time is manageable: mother, son, fat man, thugs, teacher, principal, mayor, police director, secretary, classmates. That’s a lot but they are easily distinguished by roles. The story doesn’t confuse the reader. That shows a good understanding of keeping supporting cast simple while focusing on the leads.
One thing that bugs me is how easily Li Er accepts his new reality. There's minimal grief or longing for his previous life. He just adapts and starts grinding. I get that he was a player so video game logic applies, but some emotional whiplash would make his transition feel more real.
The blind swordsman who didn't look is such a specific throwaway joke that I appreciate. It's a small worldbuilding detail that shows the guild is full of colorful characters, even if they aren't developed further